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<?php
class TErrorHandler extends TComponent implements IModule
{
const ERROR_FILE_NAME='error';
const EXCEPTION_FILE_NAME='exception';
/**
* @var string module ID
*/
private $_id;
/**
* @var TApplication application instance
*/
private $_application;
/**
* @var string error template directory
*/
private $_templatePath=null;
/**
* Initializes the module.
* This method is required by IModule and is invoked by application.
* @param TApplication application
* @param TXmlElement module configuration
*/
public function init($application,$config)
{
$this->_application=$application;
$application->attachEventHandler('Error',array($this,'handleError'));
$application->setErrorHandler($this);
}
/**
* @return string id of this module
*/
public function getID()
{
return $this->_id;
}
/**
* @param string id of this module
*/
public function setID($value)
{
$this->_id=$value;
}
public function getErrorTemplatePath()
{
return $this->_templatePath;
}
public function setErrorTemplatePath($value)
{
if(($templatePath=Prado::getPathOfNamespace($this->_templatePath))!==null && is_dir($templatePath))
$this->_templatePath=$templatePath;
else
throw new TConfigurationException('errorhandler_errortemplatepath_invalid',$value);
}
public function handleError($sender,$param)
{
static $handling=false;
// We need to restore error and exception handlers,
// otherwise because errors occured in error handler
// will not be handled properly.
restore_error_handler();
restore_exception_handler();
if($handling) // ensure that we do not enter infinite loop of error handling
$this->handleRecursiveError($param);
else
{
$handling=true;
if(($response=Prado::getApplication()->getResponse())!==null)
$response->clear();
if($param instanceof THttpException)
$this->handleExternalError($param->getStatusCode(),$param);
else if(Prado::getApplication()->getMode()==='Debug')
$this->displayException($param);
else
$this->handleExternalError(500,$param);
}
exit(1);
}
protected function handleExternalError($statusCode,$exception)
{
if(!($exception instanceof THttpException))
error_log($exception->__toString());
if($this->_templatePath===null)
$this->_templatePath=dirname(__FILE__);
$base=$this->_templatePath.'/'.self::ERROR_FILE_NAME;
$lang=array_shift(explode('-',array_shift(Prado::getUserLanguages())));
if(!empty($lang) && !ctype_alpha($lang))
$lang='';
if(is_file("$base$statusCode-$lang.tpl"))
$errorFile="$base$statusCode-$lang.tpl";
else if(is_file("$base$statusCode.tpl"))
$errorFile="$base$statusCode.tpl";
else if(is_file("$base-$lang.tpl"))
$errorFile="$base-$lang.tpl";
else
$errorFile="$base.tpl";
if(($content=@file_get_contents($errorFile))===false)
die("Unable to open error template file '$errorFile'.");
$serverAdmin=isset($_SERVER['SERVER_ADMIN'])?$_SERVER['SERVER_ADMIN']:'';
$fields=array(
'%%StatusCode%%',
'%%ErrorMessage%%',
'%%ServerAdmin%%',
'%%Version%%',
'%%Time%%'
);
$values=array(
"$statusCode",
htmlspecialchars($exception->getMessage()),
$serverAdmin,
$_SERVER['SERVER_SOFTWARE'].' <a href="http://www.pradosoft.com/">PRADO</a>/'.Prado::getVersion(),
strftime('%Y-%m-%d %H:%m',time())
);
echo str_replace($fields,$values,$content);
}
protected function handleRecursiveError($exception)
{
if(Prado::getApplication()->getMode()==='Debug')
{
echo "<html><head><title>Recursive Error</title></head>\n";
echo "<body><h1>Recursive Error</h1>\n";
echo "<pre>".$exception."</pre>\n";
echo "</body></html>";
}
else
{
error_log("Error happened while processing an existing error:\n".$param->__toString());
header('HTTP/1.0 500 Internal Error');
}
}
protected function displayException($exception)
{
$lines=file($exception->getFile());
$errorLine=$exception->getLine();
$beginLine=$errorLine-9>=0?$errorLine-9:0;
$endLine=$errorLine+8<=count($lines)?$errorLine+8:count($lines);
$source='';
for($i=$beginLine;$i<$endLine;++$i)
{
if($i===$errorLine-1)
{
$line=highlight_string(sprintf("Line %4d: %s",$i+1,$lines[$i]),true);
$source.="<div style=\"background-color: #ffeeee\">".$line."</div>";
}
else
$source.=highlight_string(sprintf("Line %4d: %s",$i+1,$lines[$i]),true);
}
$fields=array(
'%%ErrorType%%',
'%%ErrorMessage%%',
'%%SourceFile%%',
'%%SourceCode%%',
'%%StackTrace%%',
'%%Version%%',
'%%Time%%'
);
$values=array(
get_class($exception),
htmlspecialchars($exception->getMessage()),
htmlspecialchars($exception->getFile()).' ('.$exception->getLine().')',
$source,
htmlspecialchars($exception->getTraceAsString()),
$_SERVER['SERVER_SOFTWARE'].' <a href="http://www.pradosoft.com/">PRADO</a>/'.Prado::getVersion(),
strftime('%Y-%m-%d %H:%m',time())
);
$lang=array_shift(explode('-',array_shift(Prado::getUserLanguages())));
if(!empty($lang) && !ctype_alpha($lang))
$lang='';
$exceptionFile=dirname(__FILE__).'/'.self::EXCEPTION_FILE_NAME.'-'.$lang.'.tpl';
if(!is_file($exceptionFile))
$exceptionFile=dirname(__FILE__).'/'.self::EXCEPTION_FILE_NAME.'.tpl';
if(($content=@file_get_contents($exceptionFile))===false)
die("Unable to open exception template file '$exceptionFile'.");
echo str_replace($fields,$values,$content);
}
}
?>
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